Calculation of fast neutron removal cross sections for different lunar soils

摘要: Abstract The interaction of galactic cosmic rays (GCRs) and solar energetic particles (SEPs) with the lunar surface produces secondary radiations as neutrons. study production attenuation these neutrons in soil is very important to estimate annual ambient dose equivalent on for nuclear spectroscopy. Also, understanding fast soils can help measuring neutron density profile measure flux surface. In this paper, different investigated. macroscopic effective removal cross section ( Σ R ) was theoretically calculated from mass cross-section values / ρ various elements soils. obtained were discussed according density. results show that more landing sites Apollo 12 Luna 16 than other missions.